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Open Access Publications from the University of California

Statistical hadronization with exclusive channels in e+e- Annihilation

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We present a systematic analysis of exclusive hadronic channels in e+e- collisions at centre-of-mass energies between 2.1 and 2.6 GeV within the statistical hadronization model. Because of the low multiplicities involved, calculations have been carried out in the full microcanonical ensemble, including conservation of energy-momentum, angular momentum, parity, isospin, and all relevant charges. We show that the data is in an overall good agreement with the model for an energy density of about 0.5 GeV/fm3 and an extra strangeness suppression parameter γS ̃ 0:7, essentially the same values found with fits to inclusive multiplicities at higher energy.

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